JP2015066749A - Offset printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an offset printing device that is capable of preventing a deterioration of printing quality, being produced at low cost without lowering productivity, and performing high-accuracy fine pattern printing.SOLUTION: An offset printing device comprises a first mechanism for scraping the upper surface of an intaglio plate 101 with a doctor blade 102 to fill the pattern 104 of the intaglio plate 101 with ink 105, and a second mechanism for transferring the pattern 104 onto a blanket plate 308 using a pressure roll 306 moving from side to side while pressing the blanket plate 308 against the pattern 104 of the intaglio plate 101 filled with the ink 105. The first and second mechanisms are disposed so that a direction in which the intaglio plate 101 is scraped by the doctor blade 102 is orthogonal to a direction in which the pressure roll 306 rolls on the blanket plate 308.

Description

  The present invention relates to an offset printing apparatus capable of printing a fine pattern such as an electronic circuit wiring pattern and the like and an electrode pattern of various semiconductor-related devices with high accuracy.

  Electrode circuit patterns such as electronic circuit wiring patterns and various semiconductor-related devices are required to be formed with extremely high accuracy. Conventionally, such a high-precision fine pattern has been formed by a photolithography method. However, the photolithography method has a problem in that the process is complicated, an exposure apparatus for pattern formation is necessary, and there are many material losses, resulting in poor productivity and high manufacturing costs.

  As another forming method, a screen printing method is known. According to the screen printing method, the process can be simplified as compared with the photolithography method, but it is difficult to stably and repeatedly form a fine pattern (for example, a line pattern of 30 μm or less).

  In view of such problems, in recent years, offset printing has been used to form fine patterns such as electrodes. A printing apparatus using the offset printing method includes a plate on which a printing pattern is formed, a doctor blade that supplies ink to an image portion of the plate, and a blanket roll that rotates while receiving the plate and receives ink. Yes. A predetermined fine pattern can be formed on the glass substrate by printing the ink received by the blanket roll on the surface of the glass substrate or the like (see, for example, Patent Documents 1 and 2 below).

JP 2006-289931 A JP 2010-042553 A

  However, in recent years, the accuracy of ultra-fine pattern formation has been required, and even when the above-described offset printing method is used, when forming a pattern with a fine pattern, particularly a pattern composed of a combination of straight lines, the print quality is degraded. There is a case. Such a decrease in print quality is a serious problem that cannot be ignored.

The following may be considered as causes of the deterioration of the print quality due to the fine pattern.
The cause of the decrease in print quality seen in all offset printing regardless of whether it is lithographic, letterpress or intaglio is that the straight line formed on the plate in the horizontal direction is affected by the stringing phenomenon when transferring the pattern from the plate to the blanket. It is mentioned that it is not transferred to the blanket. One of the causes of this phenomenon is that the blanket roll is a cylinder. When transferring ink from the plate, the cylindrical blanket roll rolls on the plate surface at a constant speed, but the separation speed when the surface of the blanket roll contacting the plate leaves the plate surface increases at an accelerated rate. The agglomeration speed of the ink cannot follow the separation speed, and as a result, a stringing phenomenon occurs. As a result, the print quality often decreases.

  As a measure to avoid this stringing phenomenon, it is conceivable to make the rolling speed of the blanket roll as slow as possible so that the agglomeration speed of the ink follows the separation speed, but by reducing the printing speed, the amount of printing per hour The problem of worsening occurs.

  As another measure for avoiding this stringing phenomenon, a method of slowing the separation speed by enlarging the diameter of the blanket roll and enlarging the arc can be considered, but this is not practical in terms of mechanical and cost. Absent.

  In conventional gravure offset printing, a cylinder with a silicone sheet rolled onto an intaglio pattern filled with ink such as silver paste is rolled at a certain pressure to transfer the filled ink to the silicone sheet. If the transfer speed is high, the transferred ink shape is not reproduced linearly with the intaglio, so that it is necessary to slow down the transfer speed, and there is a problem that it takes an overall printing tact time.

  The present invention is made to solve the above-described problems of the conventional offset printing method, and can prevent deterioration in print quality, and can simultaneously print on both sides of a printing substrate. An object of the present invention is to provide an offset printing apparatus capable of high-precision fine pattern printing, which can improve productivity and reduce manufacturing costs.

  In order to solve the above-described problem, an offset printing apparatus according to an aspect of the present invention scrapes two intaglio plates attached to both sides of a surface plate simultaneously on the two intaglio plates with a doctor blade. A first mechanism for filling each intaglio pattern with ink, and a second mechanism for simultaneously printing two intaglio patterns filled with ink on both sides of a substrate to be printed or a continuous film, The mechanism of 2 includes a rigid frame frame, a plastic blanket plate, a gripping tool provided on the frame frame to hold both ends of the blanket plate to give uniform tension, and a blanket by pressing the blanket plate. A pressure roll that rolls on the blanket plate and moves between the holding jigs while bringing a part of the plate into contact with the intaglio, the substrate to be printed, and any continuous film. And a le, direction and pressure roll doctor blade scratch intaglio so that the direction of rolling on the blanket plate is orthogonal, wherein the first and second mechanisms are arranged.

  The blanket plate is made of a metal or resin having plasticity, and may be composed of a substrate fixed to the frame and a blanket sheet mainly composed of silicone that is in close contact with the substrate, or a metal having plasticity or You may comprise the blanket sheet | seat which has the characteristic equivalent to the board | plate which consists of resin, and which has silicone as a main component.

  In the offset printing apparatus according to this aspect, the second mechanism may be configured to move between the first surface plate and the second surface plate, or the first and second surface plates may be configured to move. The second mechanism may be sequentially moved to the position of the second mechanism. Moreover, you may print on a to-be-printed base material by a roll-to-roll system.

According to the offset printing apparatus of the present invention, since a blanket plate is used in place of the blanket cylinder, it is possible to avoid the occurrence of a thread drawing phenomenon when transferring a picture from a plate to a blanket.
Further, according to the offset printing apparatus of the present invention, the gap between the blanket plate and the intaglio and the plasticity rate of the blanket plate can be freely set and selected, so the separation speed when transferring the pattern from the plate to the blanket is optimized. Can be adjusted.
As a result, it is possible to prevent printing quality from being lowered, and to perform fine pattern printing with high accuracy that can reduce the manufacturing cost without lowering productivity (printing speed and printing amount per hour). .
Furthermore, the offset printing apparatus of this invention can implement | achieve double-sided printing simultaneously by using the structure mentioned above in the form which pinches | interposes the continuous film.

The figure explaining the ink filling operation | movement which the 1st mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (before ink filling) The figure explaining the ink filling operation | movement which the 1st mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (after ink filling) The figure explaining the ink transfer operation | movement which the 2nd mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (before ink transfer) The figure explaining the ink transfer operation | movement which the 2nd mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (after ink transfer) The figure explaining the ink retransfer operation | movement which the 2nd mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (before ink retransfer) The figure explaining the ink retransfer operation | movement which the 2nd mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (after ink retransfer) The figure which expanded a part of 2nd mechanism with which the offset printing apparatus concerning one embodiment of the present invention is provided. Schematic perspective view illustrating an example of the structure of an offset printing apparatus capable of duplex printing according to an embodiment of the present invention. 1 is a schematic side view illustrating an example of the structure of an offset printing apparatus capable of duplex printing according to an embodiment of the present invention. The figure explaining the double-sided simultaneous ink filling operation | movement which the 1st mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (before and after ink filling) The figure explaining the double-sided simultaneous ink transfer operation | movement which the 2nd mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (before ink transfer) The figure explaining the double-sided simultaneous ink transfer operation | movement which the 2nd mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (after ink transfer) The figure explaining the double-sided simultaneous ink retransfer operation | movement which the 2nd mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (before ink retransfer) The figure explaining the double-sided simultaneous ink re-transfer operation | movement which the 2nd mechanism with which the offset printing apparatus which concerns on one Embodiment of this invention is equipped (after ink re-transfer) The figure explaining the operation which evaporates the solvent which remains on the blanket board surface after ink transfer using a heater The figure explaining the operation which dries the ink printed on the film using the heater

  The offset printing apparatus of the present invention prints an intaglio pattern filled with ink on an intaglio groove on which a fine pattern is formed (hereinafter referred to as a first mechanism), and prints the intaglio pattern filled with ink on a substrate to be printed. Mechanism (hereinafter referred to as a second mechanism). Note that the offset printing apparatus of the present embodiment has other known mechanisms and configurations necessary for printing, but the description thereof is omitted here because it is not the main point of the present invention.

  Hereinafter, a preferred embodiment of an offset printing apparatus of the present invention will be described with reference to the drawings. 1 to 7 are diagrams illustrating the structure of an offset printing apparatus according to an embodiment of the present invention and the single-sided printing procedure executed by the offset printing apparatus. 8 to 14 are diagrams illustrating the structure of the offset printing apparatus according to an embodiment of the present invention and the double-sided printing procedure executed by the offset printing apparatus.

<Embodiment of single-sided printing>
First, an embodiment relating to single-sided printing using the offset printing apparatus of the present invention will be described with reference to FIGS.

[Ink filling operation]
1 and 2 are diagrams illustrating an ink filling operation performed by a first mechanism included in an offset printing apparatus according to an embodiment of the present invention. FIGS. 1A and 1B are a side perspective view and a top perspective view of the first mechanism of the offset printing apparatus before ink filling. 2A and 2B are a side perspective view and a top perspective view, respectively, relating to the first mechanism of the offset printing apparatus after ink filling.

  The intaglio 101 for offset printing is made of glass, metal, or the like, and on its surface, for example, a fine structure composed of straight lines, curves, and the like by grooves having a depth of about 1 to 20 μm and an opening width of about 1 to 100 μm A pattern 104 is formed. The intaglio 101 is placed on a surface plate (hereinafter referred to as a first surface plate) 107 with the surface on which the fine pattern 104 is formed facing upward. The pattern 104 described in FIG. 1B and the like is an example, and the pattern is not limited to this.

  The first mechanism provided in the offset printing apparatus has a spatula-shaped blade (hereinafter referred to as a doctor blade which is a general name) 102 having a flat tip made of metal or resin. In addition to the doctor blade 102, the first mechanism includes means for holding and driving the doctor blade 102. However, the first mechanism is a general means that also has a conventional offset printing apparatus. The illustration and explanation are omitted.

  The first mechanism presses the tip of the doctor blade 102 against the intaglio 101 placed on the first surface plate 107 with a constant pressure. An ink 103 such as a silver paste is disposed on the intaglio 101 in the traveling direction of the pressed doctor blade 102 ((a) and (b) in FIG. 1).

  After the ink 103 is disposed, the first mechanism moves the doctor blade 102 in the advancing direction while scratching the surface of the intaglio 101 while pressing the tip with a constant pressure (in FIG. 2, (a ) And (b)). 2A, the traveling direction of the doctor blade 102 is expressed as “from left to right” with respect to the paper surface. In FIG. 2B, the traveling direction of the doctor blade 102 is the paper surface. On the other hand, it is expressed as “from top to bottom”.

  Through this process, ink 103 such as silver paste is filled into the grooves of the pattern 104 formed on the surface of the intaglio 101. Since the doctor blade 102 having a flat tip is used, the groove of the pattern 104 of the intaglio plate 101 is filled with the ink 105 in a state where the plate surface is cut off.

[Ink transfer operation]
3 and 4 are diagrams for explaining an ink transfer operation performed by the second mechanism provided in the offset printing apparatus according to the embodiment of the present invention. FIGS. 3A, 3 </ b> B, and 3 </ b> C are a side perspective view and a top perspective view related to the second mechanism of the offset printing apparatus before ink transfer. FIGS. 4A, 4 </ b> B, and 4 </ b> C are a side perspective view and a top perspective view related to the second mechanism of the offset printing apparatus after ink transfer. FIG. 7 is an enlarged view of a part of the second mechanism provided in the offset printing apparatus.

  The second mechanism 301 included in the offset printing apparatus includes a frame frame 302, a holding jig 304, a pressure roll 306, and a blanket plate 308. The frame frame 302 is made of metal or the like and has a predetermined rigidity. The blanket plate 308 includes a substrate 305 made of metal, resin, or the like, and a blanket sheet 303 containing silicone 1101 as a main component. The substrate 305 is fixed to the frame frame 302, and the blanket sheet 303 is in close contact with the substrate 305. Note that the substrate 305 can be omitted if the blanket sheet 303 itself has the same characteristics as the substrate 305. The holding jig 304 is provided at two opposing positions of the frame frame 302. The blanket plate 308 is uniformly formed on the blanket plate 308 by clamping both ends of the blanket plate 308 (clamping allowance) and rotating in the pulling direction (arrow direction). Give (and constant) tension. The pressure roll 306 is a rotating roller processed with rubber, metal, or the like, and is a means capable of rolling and moving the blanket plate 308 to which a uniform (and constant) tension is applied by the holding jig 304 while further pressing it physically. It is. The pressure roll 306 pushes the blanket plate 308 in the vertical direction to apply pressure (in the direction of the arrow), causes plastic deformation of several μm to several hundred μm on the blanket plate 308, and maintains the plastic deformation of the blanket plate 308. Then, it moves on the blanket plate 308 in the horizontal direction of the figure.

  In the offset printing apparatus of the present embodiment, the first mechanism and the second mechanism 301 are configured such that the moving direction (rolling direction) of the pressure roll 306 in the second mechanism 301 is the direction in which the doctor blade 102 is scratched in the first mechanism. Each is installed so as to be orthogonal to (traveling direction).

  When the ink filling operation described above is completed, the intaglio 101 in which the ink 105 is filled in the groove of the pattern 104 placed on the first surface plate 107 is disposed under a second mechanism 301 at a predetermined location. ((A) and (c) of FIG. 3). Note that the second mechanism 301 side moves to the position of the first surface plate 107 in order to place the first surface plate 107 and the second mechanism 301 at predetermined positions (FIG. 3A). Alternatively, the first surface plate 107 side may move below the second mechanism 301.

  At this time, it is desirable that the frame 302 of the second mechanism 301 is provided in an inner region of the movement start position and the movement end position of the doctor blade 102 in the first mechanism. With this arrangement, the movement direction of the pressure roll 306 of the second mechanism 301 and the movement direction of the doctor blade 102 in the first mechanism are orthogonal to each other in the ink filling operation. The phenomenon that the ink 103 adheres to the blanket plate 308 and the printed matter becomes dirty can be avoided ((c) in FIG. 3). This enables smooth continuous printing.

  When the first surface plate 107 and the second mechanism 301 are disposed at predetermined positions, the second mechanism 301 is lowered (or the first surface plate 107 is raised), and the predetermined gap 407 is obtained. In this state, only the portion of the blanket plate 308 pressed by the pressure roll 306 is brought into contact with the intaglio plate 101 ((b) and (c) in FIG. 3).

  With only the pressure roll 306 in contact, the pressure roll 306 is rolled to move between the two holding jigs 304 (in the direction of the arrow), and the ink 105 filled in the pattern 104 is transferred to the blanket plate 308. The pattern 104 formed on the intaglio 101 is transferred to the blanket plate 308 (FIGS. 4A and 4C). 3B and 4B, the moving direction of the pressure roll 306 is expressed as “from right to left” with respect to the paper surface, and FIG. 3C and FIG. Also in c), the moving direction of the pressure roll 306 is expressed as “from right to left” with respect to the paper surface. That is, the moving direction of the pressure roll 306 in the second mechanism 301 is orthogonal to the traveling direction of the doctor blade 102 in the first mechanism.

  Here, the gap 407 between the blanket plate 308 and the intaglio 101 is important for avoiding a phenomenon in which the horizontal line is not clearly transferred due to the thread drawing phenomenon when the pattern is transferred from the plate to the blanket, which is the gist of the present invention. Element. By making the gap 407 as small as possible, it is possible to prevent a sudden divergence during the transfer of the ink 105 from the intaglio 101 to the blanket plate 308, and to avoid the stringing phenomenon.

  In addition, since the speed at which the blanket plate 308 returns when the state is changed from the state pressed by the intaglio plate 101 by the moving pressure roll 306 to the state where it is no longer pressed by the intaglio plate 101 is the separation speed, By selecting, the print quality can be adjusted and changed.

  Therefore, the print quality of the fine pattern in the present invention is not limited to the properties of the blanket sheet 303 and the ink 103, but the gap 407, the plastic ratio of the substrate 305 (or the blanket sheet 303 having equivalent performance), and the movement of the pressure roll 306. The speed, the pressing amount of the pressure roll 306 and the pressure can also be adjusted.

  When the transfer of the pattern 104 to the blanket plate 308 is completed, the second mechanism 301 is raised (or the first platen 107 is lowered) so that the ink 105 transferred to the blanket plate 308 does not adhere to the intaglio 101 again. Then, the blanket plate 308 is pulled away from the intaglio plate 101 ((b) and (c) in FIG. 4).

[Ink retransfer operation]
5 and 6 are diagrams for explaining the ink retransfer operation performed by the second mechanism provided in the offset printing apparatus according to the embodiment of the present invention. FIGS. 5A, 5 </ b> B, and 5 </ b> C are a side perspective view and a top perspective view regarding the second mechanism of the offset printing apparatus before ink retransfer. FIGS. 6A, 6 </ b> B, and 6 </ b> C are a side perspective view and a top perspective view related to the second mechanism of the offset printing apparatus after ink retransfer.

  When the above-described ink transfer operation is completed, a substrate to be printed 701 placed on a surface plate (hereinafter referred to as a second surface plate) 702 is disposed under a second mechanism 301 at a predetermined location. ((A) and (c) of FIG. 5). In addition, in order to arrange the second surface plate 702 and the second mechanism 301 at predetermined positions (FIG. 5A), the second mechanism 301 side moves to the position of the second surface plate 702. Alternatively, the second surface plate 702 side may move below the second mechanism 301.

  When the second surface plate 702 and the second mechanism 301 are arranged at predetermined positions, the second mechanism 301 is lowered (or the second surface plate 702 is raised), and a predetermined gap 801 is obtained. In this state, only the portion of the blanket plate 308 pressed by the pressure roll 306 is brought into contact with the substrate to be printed 701 ((b) and (c) in FIG. 5).

  In a state where only the pressure roll 306 is in contact, the pressure roll 306 is rolled to move between the two holding jigs 304, and the ink 105 transferred to the blanket plate 308 is applied to the printing substrate 701. Then, the pattern 104 formed on the intaglio 101 is transferred again to the substrate 701 to be printed ((a) and (c) of FIG. 6). 5B and FIG. 6B, the moving direction of the pressure roll 306 is expressed as “from left to right” with respect to the paper surface, and FIG. 5C and FIG. Also in (c), the moving direction of the pressure roll 306 is expressed as “from left to right” with respect to the paper surface.

  When the retransfer of the pattern 104 to the substrate 701 to be printed is completed, the second mechanism 301 is raised (or first) so that the ink 105 retransferred to the substrate 701 to be printed does not adhere to the blanket plate 308 again. 2), the blanket plate 308 is pulled away from the substrate 701 to be printed (FIGS. 6B and 6C).

<Embodiment of duplex printing>
Next, an embodiment relating to double-sided printing using the offset printing apparatus of the present invention will be described with reference to FIGS. This double-sided printing is realized by an offset printing apparatus provided with two systems of the first mechanism and the second mechanism described in the single-sided printing embodiment.

  FIG. 8 is a schematic perspective view illustrating an example of the structure of an offset printing apparatus capable of duplex printing. FIG. 9 is a schematic side view of the offset printing apparatus of FIG. 8 as viewed from the direction of the arrow. In an actual offset printing apparatus, there are a frame for fixing each mechanism, a rail for moving each mechanism, and the like. In order to easily explain the characteristic structure of the present invention, It is omitted in each drawing as necessary.

  8 and 9, intaglio plates 101 for offset printing are respectively attached to both surfaces (up and down in the drawing of FIG. 9) of a surface plate 1501 to which plates can be attached by, for example, mechanical means or vacuum suction means. . For the two intaglio plates 101 attached to the surface plate 1501, the first mechanism described above is provided individually. Further, on one side surface of the surface plate 1501 (on the right side in the drawing of FIG. 9), second mechanisms are individually provided corresponding to the two intaglio plates 101 attached to the surface plate 1501. Between these two second mechanisms, a heater 1901 by IR or hot air is arranged. Further, a continuous film 1301 that is a substrate to be printed, which is sandwiched between hot air heaters 2001, is installed on the other side surface of the surface plate 1501 (left side in the drawing of FIG. 9). In this embodiment, a continuous film 1301 is used as a substrate to be printed, but a substrate 701 that is not continuous may be used as described above.

[Ink filling operation]
FIG. 10 is a diagram illustrating a double-sided simultaneous ink filling operation performed by the first mechanism provided in the offset printing apparatus according to the embodiment of the present invention. 10A and 10B are side perspective views of the first mechanism of the offset printing apparatus before and after ink filling, respectively.

  The first mechanism provided on the upper side of the intaglio 101 fills the surface pattern 104 with ink 103 such as silver paste on the intaglio 101 attached to the upper side of the surface plate 1501 by the doctor blade 102. At the same time, the first mechanism provided on the lower side of the intaglio 101 also fills the surface pattern 104 with the ink 103 such as silver paste on the intaglio 101 attached to the lower side of the surface plate 1501 by the doctor blade 102. .

  When the ink filling operation is completed, the surface plate 1501 having the intaglio 101 attached on both sides thereof is translated in the right direction in FIG. 9 together with the continuous film 1301 and the heater 1901, and is positioned between the upper and lower sides by the second mechanism 301. Move up. After this movement, the next ink transfer operation is performed.

[Ink transfer operation]
11 and 12 are diagrams for explaining the ink transfer operation performed by the second mechanism provided in the offset printing apparatus according to the embodiment of the present invention. FIGS. 11A and 11B are side perspective views relating to the second mechanism of the offset printing apparatus before ink transfer. FIGS. 12A and 12B are side perspective views of the second mechanism of the offset printing apparatus after ink transfer.

  The second mechanism 301 provided on the upper side of the intaglio 101 applies pressure to the intaglio 101 attached to the upper side of the surface plate 1501 by pushing the blanket plate 308 vertically downward. In this state, the pressure roll 306 is rolled left and right to transfer the pattern 104 formed on the intaglio 101 to the blanket plate 308. At the same time, the second mechanism 301 provided on the lower side of the intaglio 101 also causes the pressure roll 306 to push the blanket plate 308 vertically upward against the intaglio 101 attached to the lower side of the surface plate 1501. In this state, the pressure roll 306 is rolled in the left-right direction to transfer the pattern 104 formed on the intaglio 101 to the blanket plate 308.

  When the transfer of the pattern 104 to the blanket plate 308 is completed, the surface plate 1501 is further translated in the right direction in FIG. 9 together with the continuous film 1301 and the heater 1901, and is continuously between the upper and lower second mechanisms 301. A film 1301 is disposed. After this movement, the next ink retransfer operation is performed.

[Ink retransfer operation]
13 and 14 are diagrams for explaining the ink retransfer operation performed by the second mechanism provided in the offset printing apparatus according to the embodiment of the present invention. FIGS. 13A and 13B are side perspective views of the second mechanism of the offset printing apparatus before ink retransfer. 14A and 14B are side perspective views of the second mechanism of the offset printing apparatus after ink retransfer.

  The two second mechanisms 301 provided above and below the continuous film 1301 sandwich the continuous film 1301 with two blanket plates 308 by respective pressure rolls 306 and simultaneously roll the two pressure rolls 306 in the left-right direction. The patterns 104 transferred to the respective blanket plates 308 are simultaneously printed on both sides (front and back) of the continuous film 1301.

After the printing process is completed, the surface plate 1501, the continuous film 1301, and the heater 1901 are translated in the left direction in FIG. 9 so that the heater 1901 and the heater 2001 are interposed between the two second mechanisms 301. In between, it returns to the position where the continuous film 1301 is arranged, that is, the position in the initial state of FIG.
Then, the heater 1901 is heated to evaporate the solvent remaining on the surface of the blanket plate 308 of the second mechanism 301 after the ink 103 is transferred (FIG. 15). Further, the ink 103 printed on the continuous film 1301 is dried by heating the heater 2001 (FIG. 16).

As described above, according to the offset printing apparatus according to the embodiment of the present invention, since the blanket plate 308 is used instead of the conventional blanket cylinder, the yarn drawing phenomenon when transferring the pattern from the plate to the blanket. Can be avoided. Therefore, it is possible to prevent a decrease in print quality.
In addition, according to the offset printing apparatus according to the embodiment of the present invention, the gap 407 between the blanket plate 308 and the intaglio plate 101 and the plasticity rate of the blanket plate 308 can be freely set and selected. It is possible to optimally adjust the deviation speed when transferring. Therefore, it is possible to increase the printing speed and increase the amount of printing per hour as long as no problem occurs.
Furthermore, according to the offset printing apparatus according to an embodiment of the present invention, by using the intaglio 101 and the substrate to be printed 701 sandwiched from both sides, it is possible to simultaneously perform offset printing that could only be performed on one side on both sides at the same time. Made it possible to print.

  Ink retransfer printing by a roll-to-roll method may be performed on the substrate to be printed 701 by using, for example, a substrate having a length of about several hundreds of meters wound in a roll shape.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for an offset printing apparatus that can print a fine pattern such as an electronic circuit wiring pattern and the like and electrode patterns of various semiconductor-related devices with high accuracy.

101 Intaglio
102 Doctor blade 103, 105 Ink 104 Pattern 107, 702, 1501 Surface plate 301 Mechanism 302 Frame frame 303 Blanket sheet 304 Holding jig 305 Substrate 306 Pressure roll 308 Blanket plate 407, 801 Gap 701 Printed substrate 1101 Silicone 1301 Continuous film (Substrate for printing)
1901, 2001 Heater

Claims (6)

An offset printing device,
A first mechanism that simultaneously scrapes the top of the two intaglios with a doctor blade and fills the two intaglio patterns with ink, respectively, with respect to the two intaglios attached to both sides of the platen;
A second mechanism for simultaneously printing the pattern of the two intaglio plates filled with ink on both sides of a substrate to be printed or a continuous film;
The second mechanism includes:
A rigid frame,
A blanket plate having plasticity;
A holding jig provided on the frame frame, for holding each end of the blanket plate to give a uniform tension,
A pressure that rolls on the blanket plate and moves between the holding jigs while pressing the blanket plate and bringing a part of the blanket plate into contact with any one of the intaglio, the substrate to be printed, and the continuous film. Including rolls,
The offset printing apparatus, wherein the first and second mechanisms are arranged so that a direction in which the doctor blade scratches the intaglio and a direction in which the pressure roll rolls on the blanket plate are orthogonal to each other. The blanket plate is
A substrate made of metal or resin having plasticity, and fixed to the frame frame;
The offset printing apparatus according to claim 1, wherein the offset printing apparatus is configured by a blanket sheet mainly composed of silicone, which is in close contact with the substrate.   2. The offset printing apparatus according to claim 1, wherein the blanket plate is formed of a blanket sheet mainly composed of silicone having characteristics equivalent to a plate made of plastic metal or resin.   The offset printing apparatus according to claim 1, wherein the second mechanism moves between the first surface plate and the second surface plate.   The offset printing apparatus according to claim 1, wherein the first and second surface plates sequentially move to a position of the second mechanism.   The offset printing apparatus according to claim 1, wherein printing is performed on the substrate to be printed by a roll-to-roll method.